Brazilian terrestrials, moderate size, and named after a folkloric ox rather than anything about the spider. B. cabocla is the one that moves.
Compact, dark with reddish setae, calm enough to be a reasonable intermediate choice, and undemanding on humidity. They burrow when young and settle into surface hides as adults. Nothing dramatic in either direction.
They came out of Maraca and before that sat in other genera, so older material uses names that no longer resolve. This is the kind of genus that never generates excitement and quietly represents good value, which is a category worth knowing about if you buy on merit rather than hype.